Heating furnace



8. M. SCHAUMAN HEATiNG FURNACE Nov. 10, 1925- 3. Sheets-Sheet 2 OriginalFiled May 28, 1921 Nov. 10, 1925.

B. M. SCHAUMA HEATING FURNACE priginal 1921 3 Sheets-Sheet 5 nvemto'vPatented Nov. 10, 1925.

UNITED. STATES PYAT'TTENTY OFFICE.

BROR MAX SCHAUMAN, or ATLANTIC HIGHLANDS, NEW JERSEY, ASSIGNOR or ONE-.-

FIFTH 'ro GRANDIN; v. JOHNSON, ONE-FIFTH T0 orro GA'UTSCHY, AND 0111:-FIFTH TO HARRY 1v. JOHNSON, ALL or nrcnnnnns, NEW JERSEYQONE-FIFTH: TO

WILLIAM KOCH, OF LONG BRANCH, NEW JERSEY, AND ONE-FIFTH TOIBROR MAXSGHAUMAN, OF ATLANTIC HIGHLANDS, NEW JERSEY, AN ASSOCIATION..

HEATING FURNACE.

Application filed May 28, 1921, Serial No. 473,505. Renewed February 5,1925.

To all whom it may concern:

' Be it known that I, Bnoa' MAX SCHAUMAN, a citizen of the UnitedStates, residing at Atlantic Highlands, in the county of Monmouth andState of New Jersey, have invented certain new and useful Improvementsin Heating Furnaces, of which the following is a specification.

This invention relates more particularly to heating furnaces of thesingle register type, as will be clear from the following specification.

The objects of the invention are toprovide for the accumulation andstorage of the heat and hence to prevent waste of heat, and at the sametime, to provide in effect a reservoir from which the heat may be drawnas required. 7

My invention aims to accomplish these desired results in a simple,practical and relatively inexpensive manner.

In the, accompanying drawings I have illustrated a simple and preferredembodiment of the invention, but would have it understood that thestructure may be modi-' fied without in any way departing from the truespirit and scope of the invention as hereinafter defined and claimed.

Figure 1 is a vertical sectional view of the invention embodied in asingle register type of furnace.

Figure 2 is a horizontal sectional view of the same, astaken onsubstantially the plane of line 2-2 of Figure 1. I I

Figures 3, 4 and 5 are similar views, taken on substantially the planesof lines 33, 4-4 and 55 of Figure 1, all of these sectional views beingdrawn on somewhat smaller scales than the scale of Figure 1.

Figure 6 is a broken, vertical sectional view taken on substantially theplane of line 6-6 of Figure 4.

Figures 7 and 8 are plan and edge views respectively of the auxiliaryair ring or carbureter.

The furnace illustrated is of the a coalburning type and has a closedash pit 10, fire pot l1 and combustion chamber 12, i

Grouped about the fire pot and combustion chamber are a' series oftubular columns connected'at top and bottom by thehead piece 13 and thebase 14. A special feature of these parts is that they are made of fireclay or some other suitable and eflicient heat storing and exchangingfire resisting medium.

These tubular columns and the head and ,base members provide acircuitous smoke conduit, one end of which is connected by suitablepiping 15 (Figure 1) with the com- The smoke conduit in.-

bustion chamber. this particularillustration is constituted asfollowsz'from the smoke inlet 15 through a curved passage 16 in the headblock to the vertical passage in the first column 17, and from the baseof this column through a passage 18 in the base toan upright pipe 19which extends through the wall of the come bustion chamber, and has are-entra-nt portion 20 located within the combustion cham- The upper endof the re-entrant porcolumn 28. The foot of this column is connected bya loop passage 29 in the base (Figures 4'and with piping'30" having are-entrant portion 31' disposed within: the

combustion chamber and connected at its Y upper end with an elbowpassage 32 in the head block opening into the topof the fifth column 33.The lower end of this column is connected by a loop passage 34; withpiping 35 having a re-entrant. portion 36 disposed in the combustionchamber and connected atthe top'with a passage .37 in the headwhichopens into the top of the'column 38. The bottom of this column isconnected b a. eap P sa 3 in t base Eh? shaped to previde-arecessbetween the nfor the ash pitKFigure 5), and the head is made in threesegmental parts (Figures-2 and"3) shaped to provide a recess for thecombustion chamber andrec'essedat the outer edges at one of more pointsas indicated atlo, to allow for ciroulation of the 'air being heated.

The parts thus far described are sui'- rounded. andencased within ,asuitable housing, such as'Ihave'indicated at l-4',and within the upperportion of this housing there is provideda funnel shaped collector 48having a neck 49 providing ahot air outletand forming between it and thesurrounding wallSO;anannhlarinletfil'for the air which is to be heated.

c The fresh air taken in through the inlet 51 passes downward and aftercirculating about the heat retaining or accumulating 'colui'nnsyheadandbase members and about .the fire pot and combustion chamber, risesand passes out through the outlet-'49 into the 'r oomto'be heated "TherelatiVelylOngcir cuitous smoke passage "serves to "extractsubstantially all the heat from the smoke and the re-entrant- 'portionsof such conduit accomplish a furthei extraction *of'heat from "the fuel.Ifind, in "factJtha't the construc tion disclosed operates in effect asan aceumulatorfholding the' extracted heat in storage ready to be usedwhenever necessary.

it is, of course,understoodthatthe out .let49' whiclnfor convenience ofillustration, is shown as terminating at theffurnacetop, may be extendedin practice inthe manner usual in ordinary hot-air furnacesto deliverthe heated air at distant ,points'wherever desired; or, what. amounts tothe same thing, the inlet pipe 50 maybe extendedto the points which itis desired to heat. In either case the draught which would be oausedlbythe rush of the cold air'to the furnace is avoided. In the first case,by delivering" the warm air at a distance, any air which is drawntowardthe furnace is warm and causes no discomfort; and in the secondase'a draught isa'voided by confining within a pipe the cold .e-a irwhich is d w'n :toward the 1 furnace. It is apparent that special casesinayar'ise'flin*-whi-ch are il at the wa ir s-" eli red a ance andalsoithat the 'col'd air shall drawnfmnfa"distance. lfnother words,

illustrated, 1 the base is made inthree segmental parts.

the warm air generated by the furnace may be delivered to any point andthe cold air may be drawn from any suitable point, as specificconditions in any given case may dictate. v

To promote complete combustion of fuel,

lliaveshown in Figures 1, 7 and 8 an auxilary air-supply r1ng52restingion-air-annular shoulder- 58 provided at the junction of the firepot with the wall of the combustion chamber and-having a ,neck 54extending outv to the exterior er the furnace and :there provided with aregulata-ble damper 55.

"The top of this air supply ring is inclined Figure 2. Suitable valvesor dampers =57 and 2-8 are provided in this -duct, said dampers beingcontrolled by handle rodsi59,-60 respectively.

It further possibility of control is ohtained by providing the smokeoutlet with a bran-ch passage 61 extending; laterally intocommuiiication-with the top of the-column 38 (Figure 2), and providedwith a damper 6'2 controlled'bya handle-rod 63. I

'W'h-en' the smolte andii'am-ea're to be sent directly to the stac'h 'lth'dampers- EY and -'opened so as "to smoke from the combustion chamberdirect to the stack. This inefl'e'ct bypasses onshort-circuits thecircuitous heat exchanging conduit-and on account of the direct paththusprovided, "accelerates combustion an "advantage in the starting orqi'iickeniiigof the'lire.

By opening the dampei's 57 and62 and closing the damper'SS, a portiononly of the heat exchanging conduit-willbe utilized, that portion whichincludes the heating coluinns'38, 40, 42 and $3. This elimination of thefirst part of the heating conduitfacilitates burning of the fire withoutsacrificing the entireheat exchanging effect of the circuitous smokeconduit,

Another special feature of my invention is the'provision of the furnaceair inlet with downwardly extending. Hues, such as shown 'at-(io-inFigure 6, which carry the fresh-air down close to the surface oftheliquid in thewaterjpans 66 which aresuitably'supported in the baseportion of the'fu'rnace. This causes dust carried by the incoming air tobe "deposited iirthewater and thevwatei' mas therefore utilized as -apurifying agent as well as a*hnmidifyingelement. T-hennlit) is thusautomatically cleansed and properly moistened as soon as it enters theheating chamber.

What I claim is:

l. In a heating furnace, a combustion chamber, a heat exchanging bodyhaving a circuitous smoke passage therein connected With the combustionchamber, means for passing the medium to be heated about said heatexchanging body, and connections between different sections of the bodyreentrant into the combustion chamber.

2. Ina heating furnace, a combustion chamber, a heat exchanging bodyhaving a circuitous smoke passagetherein connected with the combustionchamber, meansfor passing the medium to be heated about said heatexchanging body, and means for cutting sections of the body passage outof circuit.

3. In a heating furnace, a combustion chamber, a circuitous smokeconduit extending from said combustion chamber made up in part of a heatrefractory body and having re-entrant portions extending back into thecombustion chamber, and a casing enclosing the heat exchanging body ofthe smoke conduit and provided with means for circulating the air to beheated about the body and combustion chamber.

at. In a heating furnace, a combustion chamber, a circuitous smokeconduit extending' from said combustion chamber made up in part of aheat exchanging body and having re-entrant portions extending back intothe combustion chamber, a casing enclosing the heat exchanging body ofthe smoke conduit and provided with means for circulating the air to beheated about the body, and

combustion chamber and adjustable means for by-passing sections of theheat exchanging body.

5. In a heating furnace, a combustion chamber, a circuitous smokeconduit extending from said combustion chamber made up in part of a heatexchanging body and having re-entrant portions extending back into thecombustion chamber, a casing enclosing the heat exchanging body of thesmoke conduit and provided with means for circulating the air to beheated about the body and combustion chamber, and adjustable means forby-passing sections of the heat'exchanging body, including a smokeoutlet from the combustion chamber having a direct passage forconnection with a stack and a branch ing from said combustion chambermade up in part of a heat exchanging body and havmg re-entrant portionsextending back into the combustion chamber, a casing enclosing the heatexchanging body of the-smoke conduit and provided with means for crculating the air to be heated about the body and V l combustionchamber, an aux liary ailnlet in the combustion chamber below there-entrant portions of the smoke conduit, and means for controllingadmission ofcomb-ust-ion supporting air thereto.

7. In a furnace of the character described, a combustion chamber,upright tubular columns about the same, each column having a verticalpassage therethrough, a base on which said columns are supported and ahead resting on said columns, said columns,

base and head being constructed of heat ex-' changing fire clay and thebase and head having'loop passages therein connecting the passagesin thetubular columns and forming with such jpassages a circuitous smokepassage, said smoke passsage being connected with the combustion chamberand means for circulating the air to be heated about said heatexchanging columns, head/and base. 8. In afurnace of the characterdescribed,

a combustion chamber,upright tubular col-' umns about the same, eachcolumn having a vertical passage therethrough, a base on which saidcolumns are supported and a head resting on said columns, said columns,base and head being constructed of heat exchanging-fire clay and thebase and head having loop passages therein connecting the passages inthe tubular columns and forming with such passages a circuitous smokepassage, said smoke passage being connected With the combustion chamberand means for circulating the air to be heated about said heatexchanging columns, head and base,

,the smoke passage described having intermeans for cutting out ofthe'heating circuit a portion of the passage through the body, theproducts from the combustion chamber being diverted from said cut-outportion to said direct passage. c

11. In a heating furnace having an outlet, a combustion chamber, a heatexchanging body, a passage from said chamber through the body to saidoutlet, a second passage from said chamber direct to said outlet,

means for cutting out of theheating circuit the passage through thebody, and means for communieation with the beginning, end, and cuttingout of the heatingcircuit- 1)'01 -ti'on an in'tei'mediafe' portion ofthe passage; zind (If-the passagethrou ghthe bio'dy. 'clafi'ipesfin sarid 'by'qaas's at said communi- 1 12. 'In a hea ting fufh'acehaving anoutlet, eating points for controlling the hea't'eircuit 5 a omb'l'istionchamber, "av heat exhan'ging through said passage and sai d by pa-ssbody,"a=-passage 'fIODTSa-id"iHiinbe1 fh1OHgh lntestimony Whereof Iaffixsigh-atui'e. the body to said outlet, a bypass having BRO'R MAXSGHI'YUMAN.

